package jwebtest.rpc.util;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class RpcUtil {

	/**
	 * @return 本机IP
	 * @throws SocketException
	 */
	public static String getLocalRealIp() {
		try {
			String localip = null;// 本地IP，如果没有配置外网IP则返回它
			String netip = null;// 外网IP
			String localHost = null;
			try {
				localHost = InetAddress.getLocalHost().getHostAddress().toString();
			} catch (Exception e) {
				e.printStackTrace();
			}
			Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
			InetAddress ip = null;
			boolean finded = false;// 是否找到外网IP

			while (netInterfaces.hasMoreElements() && !finded) {
				NetworkInterface ni = netInterfaces.nextElement();
				Enumeration<InetAddress> address = ni.getInetAddresses();
				while (address.hasMoreElements()) {
					ip = address.nextElement();
					if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) {// 外网IP
						netip = ip.getHostAddress();
						finded = true;
						break;
					} else if (ip.isSiteLocalAddress() && !ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) {// 内网IP
						localip = ip.getHostAddress();
						if (localip.equals(localHost)) {
							finded = true;
							break;
						}
					}
				}
			}
			if (netip != null && !"".equals(netip)) {
				return netip;
			} else {
				return localip;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "";
	}
}
